EDIT: So now I have my answer, 2.8 doesn't work with my OS (10.9.5), but it works with a more recent one like Mojave.
I wonder how to enable Eevee on a Macbook pro. For the moment if I choose Eevee as Render Engine, here is the result I get (image below, Rendered mode with no material). I also screenshot my Preferences if it helps. My Macbook Pro is a Retina, 15 pouces, mid-2014, the video card is Intel Iris Pro (GPU type), OS X (version 10.9.5).
Thanks a lot!!!